题目

下列能源是来自于太阳能的是A. 潮汐能 B. 地热能 C. 天然气 D. 核能 答案：【答案】C【解析】除了地热能、潮汐能和核能以外，地球上所有其他能源全部来自太阳能，这是“广义太阳能”，以便与仅指太阳辐射能的“狭义太阳能”相区别。潮汐能和月亮有关，是由于月球的引力，故C符合题意。故选C.The class in America is almost the same as that in China. But something is different.☆ In America, if the teacher asks you a question but you don’t understand, you should put up your hand and ask the teacher to repeat it. If you don’t know the answer, it is all right to tell the teacher you don’t know. Then he or she knows what you need to learn.☆ You mustn’t be absent on a test day. If you’re badly ill, call and let the teacher know you will not be there for the test. If your teacher allows make-up tests (补考), you should take the test in one or two days after you go back to school.☆ Be on time! It is impolite to be late. If you come late, be sure to do it quietly. Take your books out of your bag after you go into the classroom. Then go to your seat and sit down quietly. In the US, you needn’t knock at the door before you come into the classroom.☆ If you have to leave during the class, do it quietly, too. There is no need to ask the teacher’s agreement.1. In America, if you don’t know the answer to the question in class, you should _____.A. keep quiet B. tell your teacher you don’t knowC. repeat the question D. be laughed at2.What’s the Chinese for “absent”?A. 迟到的 B.早到的 C.早退的 D. 缺席的3.In the USA, if you’re late for class, you ___.A. must knock at the door B. must go into the classroom quietlyC. should wait for the next class outsideD. should take your books out of your bag.4. Which of the following about the class in America is true?A. The class in America is the same as that in China.B. In the USA, if you are late, you must tell your teacher why.C. In the USA , you can leave the classroom without the teacher’s agreement.D. If you don’t understand the teacher’s question, you can’t ask him/her to repeat it in the USA.